... Data 2,Rated Voltage(V):Three-phase four-wire 3x220/380V or 3x57.7/100V Three-phase Three-wire 3x100V or 3x380V 3 ... electricity stealing proof,high accuracy, high reliability, high overload, low power consumption, light weight etc 2,Measure three phase active electric energy, ... four wire)phase, uninfected measurement 4,Wide service temperature range 5,Assuming output of electric energy test signal 6 ...